Problem Solving (PS) | Re: Two machines A and B work at constant rates which are in the ratio of

[quote="Aditya1409"][quote="Bunuel"]Two machines A and B work at constant rates which are in the ratio of 1:2 respectively. If the two machines work together, they can complete 1/3rd of a job in 3 hours. If machine A starts working on the job and works alone for 18 hours, how many hours would machine B working alone take to complete the remaining work?

A. 3.5
B. 4
C. 4.5
D. 5
E. 5.5


Answer is C

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Statistics : Posted by Aditya1409 • on 03 Jun 2020, 11:04 • Replies 8 • Views 3033

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